ACOUSTIC
PROPERTIES
Alumetal u.s.a Futuristic Ceiling
Systems allow for a high level of
sound absorption and attenuation.
Ceiling Panels are available with
or without non-woven acoustic infill
material bonded into them during manufacture.
Infill materials are black or white
non-woven acoustical tissue that produces
excellent sound absorption. Alternatively,
black film can be specified to reduce
air movement and dust penetration
through perforations. Mineral wool
acoustical pads can also be supplied
in a wide range of thickness and densities.
Sound
Absorption ALUMETAL U.S.A Futuristic Systems
are continually tested by international
independent laboratories in U.K and
U.S.A for sound absorption and acoustic
performance to conform to ISO 354-1985.
Example: ALUMETAL U.S.A with 16% open
area perforations lined with 0.05mm
thick non-woven acoustic tissue.
TEST
SPECIMEN
FREQUENCY
(Hz)
125
250
500
1000
2000
4000
1/3
Oct.
0.34
0.84
0.79
0.69
0.69
0.67
0.60
0.78
0.71
0.66
0.69
0.66
0.89
0.84
0.61
0.64
0.69
0.64
1/1
Oct.
0.61
0.82
0.70
0.66
0.69
0.66
Perforation Examples
2.3mm
diameter hole on a 5x5mm
square pitch with a 16%
open area
1.8mm
diameter holes on a 10x10cm
diagonal design pattern
with a 16% open area
2.3mm
diameter holes on a 5x5cm
square pitch on a designer
quarter grid pattern with
a 16% open area
6mm
diameter holes on a 8x8cm
square pitch with a 40%
open area
1.8mm
diameter holes on a 3.5x3.5cm
square pitch with a 21%
open area
1.8mm
diameter holes on a 10x10cm
square designer pattern
giving an open area of 16%
